This monograph comprises eight papers, most of which originated as presentations given at international conferences or guest lectures. These papers deal with the problematic nature of English as a global language, and discuss what makes texts authentic and reliable for linguistic analysis, Scots in Ulster and in Scotland, forms and functions of English in Southeast Asia, the spread of rhyming slang, and varieties of ELT. The volume concludes with an annotated bibliography of the most important publications devoted to varieties of English around the world.